Shaft straightener



Oct. 25, 1938. 5, HE H 2,134,073

SHAFT STRAIGHTENER Filed Oct. 5, 1937 In Us n tor; Wayzzefl flakea.

JWzrz f2. 6072602,

UNITED STAT S FATENT OFFICE SHAFT STRAIGHTENER Wayne-D. Cohea and John R. Cohea, Frederick,

Okla.

Application October 5, 1937, Serial No. 167,476

1 Claim. (Cl. 15352) This invention relates to machinists or meis placed in the lathe between the centers therechanics implements for straightening shafts and of, or where such a type of lathe is used the shaft shafting, and, more specifically stated, consists in or rod is placed in the chuck and center rest, so an implement of this character which is especially that the shaft will be properly supported and ro- 5 adapted for use on a lathe to be used in conjunctated. Heat is applied to the bent portion of the 5 tion therewith for straightening the rod or shaft rod or shaft while the same is turning. The as the same is being rotated by the lathe. shank part of the tool is placed in the holder post The invention together with its objects and of the lathe and the post adjusted in the usual advantages will be best understood from a study manner to bring the rollers l0 against the bent of the following description taken in connection portion of the shaft and the rollers ID are held in 10 with the accompanying drawing wherein such contact until the rod or shaft has been Figure l is a side elevational view of the device. straightened. The rollers l2 are maintained in Figure 2 is a top plan thereof, and rolling contact with the shaft until the metal Figure 3 is a sectional view taken substantially thereof has set or cooled to a degree as will insure on the line 33 of Figure 1. the maintenance of the straight form of the shaft 15 Referring to the drawing by reference numerwhich has been thus obtained. als it will be seen that in a preferred embodiment An advantage of a tool of this character is that thereof the shaft straightener comprises a shank pressure can be applied to such an extent that a 5 of a size and shape to be accommodated in the scratching or roughening of the surface of the rod usually provided vertical slot of the vertical post or shaft will not thereby result, this being due to 20 of a tool h l er f r n p t f a lathe q ipm n the fact that rollers is will rotate with the shaft. and more particularly to that type of tool holder Thus the shaft or rod will maintain the desired which is mounted on the lathe between the cenpolished surface thereof, when such a surface is ters t ereof s t a e 15001 y be P perly desirable, as for accommodating a bearing or the brought into engagement with the work held belike. 25 tween the centers of the lathe. It is thought that a clear understanding of the At one end thereof the shank 5 is provided construction, utility and advantages of a shaft with an enlarged head 6 that includes a pair of straightener of this character will be had without spaced parallel side plates 1 the free vertical edges a more detailed description.

of which, as shown in Figure are convex at the Having thus described the invention what is 30 upper and lower ends thereof as at 8 and concave claimed as new is: intermediate said ends as at 9. A shaft straightening attachment for a lathe Journaled between the side plates 1 of head 6 comprising a shank for engagement with the tool are work-engaging rollers l0. holder post of a lathe, an enlargement at one end 5 Each roller It] includes an inner race I and of the shank extending from one side edge therean outer race I2 between which are balls or antiof, said enlargement and the adjacent end of the friction elements 13. shank being of forked construction, a pair of Also each roller is supported by a pivot pin or rollers located between the prongs thereof and stub shaft N that as O e fi t s y in having portions projecting beyond the ends of the an enlarged Opening !5 in One Side P e 7 and prongs, each roller comprising inner and outer 40 has a materially reducedfitting snugly in races and anti-friction means between the races a relatively smaller opening I! in the opposite side and pivot pins passing through the prongs and plate 1 as clearly shown in Figure 3. through the center races of the two rollers, each The p p y of he rollers I0 projects beyo d pin having a reduced end fitting in a hole in one 5 the free longitudinal edges of the side plates 1 as prong and its larger end fitting in a hole in the .45

shown in Figures 1 and 2, so as to peripherally opposite prong. engage the rod or shaft to be straightened. WAYNE D. COHEA- In using the device the shaft to be straightened JOHN R. COHEA. 

